What is the difference between AC & DC charging?
Col 1 | Col 2 | |
---|---|---|
Alternating Current (AC) | Direct Current (DC) | |
Type of Current | Alternating current periodically reverses direction, flowing in both positive and negative cycles. | Direct current flows consistently in one direction, from positive to negative terminals. |
Voltage and Power Levels | Usual charging speed can go up to 22kW . AC chargers typically operate at lower voltage levels, commonly 120V or 240V. | High performance charging up to 360kW. DC chargers operate at higher voltage levels, ranging from several hundred volts to over 1,000 volts. |
Charging Speed (depending on battery capacity and intake) | AC chargers are usually slower and more suitable for overnight charging or longer charging sessions of approximately 7 to 15 hours. | With DC chargers providing high performance charging, it takes only an hour for a quick charge. |
Charging Infrastructure | AC chargers are more common and readily available, especially in residential areas, public charging stations such as shopping malls and office buildings. | DC chargers are increasingly available, especially along major highways, dealerships and at EV charging stations designed for quick recharges. |
Charging Compatibility | Most EVs come with onboard AC chargers, making them compatible with standard AC charging infrastructure. | Only vehicles equipped with DC charging capability can take advantage of fast-charging stations. |
Charging Efficiency | AC chargers are generally less efficient, compared to DC chargers, due to energy losses during the conversion process from AC to DC within the vehicle's onboard charger. | DC chargers are more efficient because they deliver DC power directly to the vehicle's battery. |
Charging Cost | AC chargers are considered more cost effective with its slower charging speed. It is suitable for installation at home and at public charging stations. | DC chargers tend to be more expensive with premium rates due to high infrastructure costs. |